Valve-facing tool



S. D. HARTOG.

VALVE FACING TOOL.

- APPLICATION FILED MAY 8. 1919.

1 ,352, 599 Patented Sept. 14, 1920.

STEPHEN D. HARTOG,

FACT'UR'ING COMPANY,

OF ST. LOUIS, MISSOURI,

AssIGNoR ro s. D. HAIR/DOG MANU- OF ST. LOUIS, MISSOURI, A CORPORATION.

VALVE-FACING TOOL.

Specification of Letters Patent.

Patented Sept. .111, 192 0.

Application filed May 8, 1919. Serial No. 295,621.

To all whom it may concern:

Be it known that I, STEPHEN D. HARroG, a citizen of the United States, residing at St. Louis,.lviissouri, have invented a certain new and useful Improvement in Valve-Facing Tools, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, refer ence being had to the accompanying drawin s, forming part of this specification.

1 y invention relates to new and useful improvements intools for refinishing the faces or beveled edgesof valves and particularly those valves utilized in internal combustion engines.

T he principal ob 'ects of my invention are, to provide a relatively simple, inexpensive and easily operate-d tool which will be effective in saving much time, labor and consequent expense in refaeing or finishing the beveled edges of valves; and further to provide a tool that will without change or ad justment of parts, accommodate valves of different sizes.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is an elevational view of a valve facingtool of my improved construction.

Fig. 2 is a cross section taken approximately on the line 2-2 of Fig. 1.

Fig. 3 is a cross section taken approximately on the line 8-3 of Fig. 1.

Fig. l is a vertical section taken through the central portion of the reversible blade or cutting member of my improved facing tool.

Referring by numerals ing drawings which illustrate a practical embodiment of m invention, 10 designates the base or body of the tool, the same being preferably cast and formed integral there with and projecting upwardly therefrom is a pair of substantially rectangular hollow housings ll. Formed in the tops of the side walls of these housings are notches 12, the same being arranged in horizontal alinement and serving as bearings for the stem of the valve which is being faced with my improved tool.

Arranged to move freely in each housing to the accompany- Y 11 is a valve stem clamping member-1;) in the upper portion of which is formedan aperture 14 for the accommodation of the valve stem. Formed in the upper portion of each clamping member 13 and communicating with the aperture ll therein is an aperture or duct-15 through which oil is introduced to lubricate that part of the valve stem which occupies the notches l2 and aperture 14. j

Formed in one of the ed gcs of each member 13 is a notch 16, one of the edges of which is beveled or inclined as designated by 17' and adapted to bear against this beveled or inclined edge or face is a screw 18 and which latter passes through one of the end walls of the housing 11.

Formed integral with one end of plate of the housings 11 is a vertically disposed block 19, the upper portion ofwhich is bifurcated to form a vertically disposed slot 20, the bottom of which is inclined. Removably positioned in this slot is a blade 21,

the face preferably formed of high-speed tool steel.

and the top and bottom edges of this blade are slightly inclined or beveled as designated by 22in order to form cutting edges 23.

Seated in the block 19 to one side of the slot 20 therein are one or more set screws 24; the inner ends of which are adapted to bear directly against one of the side faces of the blade in order to rigidly retain said blade in operative position.

The width of blade 21 is slightly greater than the depth of slot 20 so that when the blade is properly positioned in the slot, the upper edge of the blade projects above the upper edges of the walls to the sides of said slot and as the bottom of the slot is inclined, this projecting upper edge of the blade will occupy an inclined position, the angularity of which corresponds to the angularity or bevel on the edge of the ordinary valve utilized in internal combustion engines.

To reface or finishthe edge of a valve with my improved tool, the screws 18 are partially withdrawn from the housings 11, thereby permitting the clamping members 13 to be elevated so that the stem A of a valve can be inserted though the apertures 14 and positioned in the notches 12. The screws 18 are now manipulated so as to enter the housings 11 and when the inner 10 and immediately in front of one ends of said screws engage the beveled or inclined edges 17 of the notches 16, the members 1-5 will be drawn downwardly into the housings, thereby firmly holding the. valve stem in position in the notches 12 but at the same time permitting said valve stem to rotate with a considerable degree of freedom.

A crank handle such as B is now secured in any suitable manner upon the end of the valve stem A and said crank handle manipulated in the usual manner to rotate the valve stem during which operation a slight pressure of the thumb or lingers is applied to the outer face of valve O to force its beveled face or edge D into engagement with the inclined cutting edge on the top of blade 21. As this rotary movement of the valve and stem is continued, the engagement of the cutting edge 23 of the blade with the beveled edge or face D of the valve will quickly and efficiently remove from said beveled face all incrustations of carbon, rust or other foreign substance and likewise remove a suiiicient amount of metal. from said beveled edge to form an entirely new surface which when the valve is repositioned in the engine will cooperate with the valve seat to form a gas-tight joint and consequently increase the efficiency of the engine.

\Vhen the active cutting edge of the blade 21 becomes worn so as to be unfit for service, the set screws 2% are loosened a sullicient degree to permit the blade to be removed and by reversing the position of said blade or turning it up side down a new cutting edge is brought into active position.

A valve facing tool of my improved construction is comparatively simple, can be easily and cheaply manufactured, is very effective in facing or refinishing the beveled edges of valves and likewise effective in saving much of the time, labor and consequent expense ordinarily involved in refaoing valves.

It will be readily understood that minor changes in the size, form and construction of the various parts of my improved valve facing tool can be made and substituted for those herein shown and described, without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

XV hat I claim is:

1. In a tool of the class described, a base, spaced housings thereon, bearing members slidingly positioned in the housings, said housings being provided with notches and the bearing members being provided with apertures, which notches and apertures are adapted to cooperate and form bearings for a valve stem, there being a notch in the side of each bearing member, each of said notches being provided with an inclined face, a set screw penetrating the corresponding wall of each housing and adapted to bear against the inclined face of each notch thereby securing the bearing members in any predeterminecv position, and a blade on said base adjacent one of said bearings.

2. In a valve facing tool, a base, spaced housings projecting upwardly therefrom, the upper portions of which housings are provided with notches, bearing members arranged for sliding movement in saidhousings, said bearing members being provided with apertures which cooperate with the notches in the housings to form bearings for a valve stem, the lower portion of each earing member being provided with an in set screws operating through uined face, the housings and adapted to bear against the inclined faces for maintaining the bearing members in any pre letermined position, a c ck formed on the base adjacent to one of the housings, said block being provided with an inclined slot, and a doubled edge blade removably positioned in said slot.

In testimony whereof I hereunto my signature this 5th day of May, 191.9.

STEPHEN D. HARTOG. 

